The other scenario is that the good-lawyer-you-know has a personal relationship with a practicing (as opposed to managing) IP lawyer. This may be a solo practitioner. But the problem with this approach is the the good-lawyer-you-know is relying on an instinctual assessment of the IP lawyer (I like this person; they seem smart), since the good-lawyer you know has not had a need to defend or litigate IP matters.
My experience comes from working with a dozen different lawyers, with many being rereferred. I have had $1200/hour partners provide me with factually incorrect information (wrong about actual black-and-white law). And I have had lawyers provide me with $20,000 legal briefs I did not authorize or order.
When it comes to litigation attorneys, I have had some success finding a lawyer through other founders who had been fighting lawsuits for years and hired/fired several lawyers to finally settle on the most competent. I have also had luck in finding legal specialists by becoming very well informed on the subject matter (reading lots of case law) and then interviewing random lawyers, who I usually came across through legal blog posts.